Red and yellow Lucifer Canna Lily [Canna x generalis]

My mom gave me this Canna many years ago and it is blooming again. It was never very happy in a pot until we got two very tall (2.5 feet) skinny (12") pots. It seems to love to put its roots down, way down.

It is called a Canna "Lily" but it is more closely related to Ginger and Banana plants.